Hairpin



C. A DIES.

HAIRPIN.

APPLICATION FILED FEB. 19. 1920.

Patented Nov. 9, 1920.

UNITED STATES PATENT OFFICE.

specification of Letters Patent.

Patented Nov. 9, 1920.

Application filed February 19, 1920. Serial No. 359,863.

To all whom it may concern.

Be it known that 1, CHARLES A. DIES, a citizen of the United States ofAmerica, and a resident of Chicago, in the county of Cook, State ofIllinois, have invented certain new and useful Improvements in Hairpins,of which the following is a specification.

This invention relates to that type of elongated U shape hair pins theparallel prongs of which are formed with corrugations to retard gradualdetachment of the hair pin in actual use.

The present improvement has for its object, to provide a structuralformation of parts, of a hair pin whereby an integrally formed means isprovided and which is adapted to provide a very effective resistance tomovement in the hair of the user, and which means as applied to thecrown of the hair pin affords a convenient hand grasp for manualoperation, all as will hereinafter more fully appear.

In the accompanying drawing Figure 1, is a front elevation embodying thepreferred form of the present invention.

Fig. 2, is a side elevation of the same.

Fig. 3, is a transverse sectional elevation on line 3-3 Fig. 1.

Fig. 4, is a detail horizontal section on line 4-4 Fig. 1.

Like reference numerals indicate like parts in the different views.

Referring to the drawing, 1 designates the approximately parallel tinesor prongs of a wire or like hair pin integrally connected together atone end by a crown or arch portion 2, the respective parts beingpreferably of the usual circular form in cross-section.

The present invention in such ordinary type of hair pins as well as inother approximating types of hair pins, more or less in general use,comprises a structural forma tion as follows 3 designates a plurality ofslits formed at intervals the mid-thickness of the prongs 1, andpreferably in planes parallel with the front of the hen pin. The slits 3provide counterpart sections which are adapted to be displaced laterallyand in opposite directions to form a series of curved humps 4 at therespective sides of the prongs 1 as shown, and adapted to afford therequired retardments to movement of the hair pin in actual use. 1

In the manufacture of the present hair pin from metal wire, the slits 3and humps 4 will be formed by the operation of suitable dies acting toeffect such operations in one movement of such dies. When ductilematerial, such as celluloid is employed, suitably formed molds or formswill be used to mold such material into the described shape.

5 designates a slit similar to the slits 5 above described formed in thecrown portion 2 of the hair pin and in the same direction, and which inlike manner provides humps or bulges 6 of different radii and adapted toafford an effective finger grip for grasping the hair pin, and at thesame time impart increased stiffness to said crown 2.

Having thus fully described my said invention what I claim as new anddesire to secure by Letters Patent, is

1. A pin prong having a local longitudinal slit, the sections formed bysaid slit being displaced in opposite directions to form twin humps.

2. A hair pin, the prongs of which are formed with local longitudinalslits, the sections formed by said slits being displaced in oppositedirections and in planes parallel with the front of the pin to formhumps.

3. A hair pin having prongs and a connecting crown, said crown having alocal longitudinal slit, the sections formed by said slit beingdisplaced in opposite directions and in a plane parallel with the frontof said crown.

Signed at Chicago, Illinois, this 16th day of February, 1920.

UHARLES A. DIES.

